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No. 619,295. Patented Feb; l4, I899. C. F. FLODHUIST.

ARIDR PLATE.

(Appliution filed July '7, 1897.)

(No ModeL) W/ TNE SSE 3 UNITED STATES PATENT OFFICE.

CARL FREDRIK FLODQUIST, OF NE\V YORK, N. Y.

ARMOR-PLATE.

SPECIFICATION forming part of Letters Patent No. 619,295, dated February 14, 1899.

Application filed July '7, 1897. Serial No. 643,753. (No model.)

To all whom, it may concern:

Be it known that I, CARL FREDRIK FLoD- QUIST, a subject of the King of Sweden and Norway, residing at New York, (Brooklyn,) in the county of Kings and State of New York, have invented certain new and useful In1- provements in Armor-Plates, of which the following is a full and complete specification, such as will enable those skilled in the art to which it appertains to make and use the same,

This invention is the same as that for which Letters Patent were granted in Great Britain July 26, 1S97, No.17,536, and relates to armorplates for war vessels; and the object thereof is to provide armor plating for this purpose with corrugations or ribs on the outer surface thereof of novel form and construction, which serve to break the force of the shot and to diminish the penetrating power thereof.

The invention is fully disclosed in the following specification, of which the accompanying drawings form a part, in which- Figure 1 is an outside view of an armorplate constructed according to my invention, and Fig. 2 an end View or cross-section thereof.

In the drawings forming part of this specification the separate parts of my improvement are designated by the same numerals of reference in each of the views, and in said drawings I have shown at 5 a section of an armorplate which is provided on the outer surface thereof with longitudinal ribs or corrugations 6. The ribs or corrugations may be of any desired size in cross-section, and in practice said ribs or corrugations are wave-shaped or longitudinally curved, so as to form longitudinal lateral undulations.

An armor-plate constructed according to my invention need not be as thick as when the outer surface thereof is perfectly smooth, and by reason of my construction the weight of and material employed in the plate are much reduced and the cost of the same also correspondingly decreased.

The wave-shaped corrugations 6 are preferably semicircular in cross-section and serve to deflect a shot and to break the force thereof, as will be readily understood, and my improved armor-plate is perfectly adapted to accomplish the result for which it is intended.

Having fully described my invention, I claim as new and desire to secure by Letters Patent 1. An armor-plate provided on its outer sur face with ribs or corrugations which are laterally curved or undulated so as to produce a wave-shaped or undulating effect, substantially as shown and described.

2. An armor-plate provided onits outer surface with ribs or corrugations which are laterally curved or undulated so as to produce a wave-shaped or undulating effect, and said corrugations being semicircular in cross-section, substantially as shown and described.

In testimony that I claim the foregoing as my invention I have signed my name, in presence of the subscribing witnesses, this 1st day of July 1897.

CARL FREDBIK FLOD QUIST.

lVitnesses:

O. GERsT, A. O. VAN BLARcoM. 

